ACW allows you to (for instance) open an mp3 in RB, use the ACW to get the chords, and set the tempo to the mp3 (or wav or whatever) and send it back to RB, so you can then generate additional parts, or just have the chords and record more parts, or finish a piece you started years ago.
Very powerful.


Make your sound your own!
.. I do not work here, but the benefits are still awesome